RST Engineering wrote:
or whether any one of a number of ways of generating
electricity from heat has been attempted to convert waste exhaust gas into
excited little electrons?

Lots of wind to cool around an exhaust pipe, and the rotary's exhaust is
noted for being exceptionally hot. Dang-it, Jim! Now you've got me
thinking again. Everytime I start doing that, by build time increases
by another three months.

Read this:

http://www.fieldlines.com/story/2005/11/2/31928/0770